class Book(object):
    def __init__(self):
        self.name = ""
        self.author = ""
        self.publish_time = ""
        self.publisher = ""
        self.sell_price = 0.0
        self.priceTit = 0.0
        self.url = ""
        self.topic = ""
    name: str
    url: str
    author: str
    pulishTiem: str
    publisher: str
    price: float
    topic: str
